:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #1d2127;
  --muted: #6b7280;
  --line: #e6e8ec;
  --accent: #2563eb;
  --accent-ink: #ffffff;
  --danger: #dc2626;
  --ok-bg: #ecfdf5; --ok-ink: #047857;
  --err-bg: #fef2f2; --err-ink: #b91c1c;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
a { color: var(--accent); }

.topbar {
  display: flex; align-items: center; gap: 18px;
  padding: 0 22px; height: 56px;
  background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; font-size: 18px; text-decoration: none; color: var(--ink); }
.brand span { color: var(--muted); font-weight: 500; }
.topbar nav { display: flex; gap: 6px; }
.topbar nav a { padding: 6px 12px; border-radius: 8px; text-decoration: none; color: var(--muted); }
.topbar nav a.on, .topbar nav a:hover { background: #eef2ff; color: var(--accent); }
.topbar .spacer { flex: 1; }
.topbar .who { color: var(--muted); font-size: 14px; }

main.app { max-width: 1100px; margin: 0 auto; padding: 26px 22px 60px; }
main.auth { max-width: 420px; margin: 8vh auto; padding: 0 18px; }

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 17px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 0 0 8px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px; margin-bottom: 18px;
}
.card.narrow { max-width: 420px; }
.card.empty { text-align: center; padding: 40px 20px; }

.row { display: flex; align-items: center; }
.row.between { justify-content: space-between; }
.row.gap { gap: 10px; }
.row.wrap { flex-wrap: wrap; }
.between { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.inline { display: inline; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 18px; align-items: start; }
@media (max-width: 860px) { .split, .grid2 { grid-template-columns: 1fr; } }
/* Editor pages: stack so the preview spans full width and shows the whole footer. */
.editor { display: block; }
.editor > .card { margin-bottom: 18px; }
.editor > .form { max-width: 600px; }
.editor > .preview-card { width: 100%; }

label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 12px; }
.muted + input, label .muted { font-weight: 400; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; margin-top: 5px; padding: 9px 11px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 14px;
  font-family: inherit; background: #fff; color: var(--ink);
}
input[type=color] { width: 46px; height: 34px; padding: 2px; margin-top: 5px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
textarea { resize: vertical; }
fieldset { border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; margin: 0 0 16px; }
legend { font-weight: 600; font-size: 13px; padding: 0 6px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.checks { display: flex; flex-wrap: wrap; gap: 14px; }
.check { display: flex; align-items: center; gap: 6px; font-weight: 400; margin: 0; }
.check input { width: auto; margin: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 8px 14px; border-radius: 8px; border: 1px solid var(--line);
  background: #fff; color: var(--ink); font-size: 14px; font-weight: 500;
  text-decoration: none; cursor: pointer;
}
.btn:hover { background: #f3f4f6; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.05); }
.btn.danger { color: var(--danger); border-color: #f3c2c2; background: #fff; }
.btn.danger:hover { background: var(--err-bg); }
.btn.tiny { padding: 3px 8px; font-size: 12px; }
button.link { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 14px; padding: 0; }
button.link:hover { color: var(--accent); }

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.flash-ok { background: var(--ok-bg); color: var(--ok-ink); }
.flash-err { background: var(--err-bg); color: var(--err-ink); }

.preview-frame { width: 100%; min-height: 300px; border: 1px dashed var(--line); border-radius: 8px; background: #fff; }
.code { width: 100%; font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 12px; }
code { background: #f3f4f6; padding: 1px 6px; border-radius: 5px; font-size: 12px; }

.thumbs { display: flex; flex-wrap: wrap; gap: 12px; margin: 12px 0; }
.thumb { margin: 0; position: relative; border: 1px solid var(--line); border-radius: 8px; padding: 6px; background: #fafafa; text-align: center; }
.thumb img { max-width: 160px; max-height: 90px; display: block; }
.thumb figcaption { font-size: 11px; color: var(--muted); margin-top: 4px; }
.thumb form { position: absolute; top: 4px; right: 4px; }
.share-label { margin-top: 14px; font-size: 13px; }
.share { display: flex; gap: 8px; align-items: center; margin-top: 5px; }
.share-url { flex: 1; margin: 0; font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 12px; background: #f8fafc; }
.resize { display: flex; align-items: center; gap: 6px; margin: 0; font-weight: 400; font-size: 13px; color: var(--muted); }
.resize input { width: 84px; margin-top: 0; }
.set { border-top: 1px solid var(--line); padding-top: 16px; margin-top: 16px; }
.set:first-of-type { border-top: none; }
.form fieldset:last-of-type { margin-bottom: 0; }